WO2019210976A1

WO2019210976A1 - Stamp and method for embossing

Info

Publication number: WO2019210976A1
Application number: PCT/EP2018/061584
Authority: WO
Inventors: Markus Wimplinger; Gerald MITTENDORFER
Original assignee: Ev Group E. Thallner Gmbh
Priority date: 2018-05-04
Filing date: 2018-05-04
Publication date: 2019-11-07
Also published as: JP7177852B2; JP2021529682A; CN112041744A; KR20210003772A; EP3788443A1; US20210240075A1; TW201947317A; TWI804606B; EP3788443B1

Abstract

The invention relates to a stamp (3) comprising a soft stamp (2) and a support (1) attached to the soft stamp (2).

Description

Stamp and method for embossing

Description

The invention relates to a stamp, a use of a stamp, a device with a stamp and a method for embossing according to the independent claims.

The prior art has two basic types of

Curing mechanisms for an embossing mass, which can be formed by one of the innumerable embossing methods. On the one hand you can thermic the Prägemas se, on the other hand by means of electromagnetic radiation. In addition, there are in the prior art thermal embossing process ("hot stamping", English "hot embossing"), which is embossed in thermoplastic materials. In particular, the thermal curing or thermal embossing process by means of devices that have very complex, large heating systems, which can muster the necessary heat. These heating systems are located above and / or below the stamp or the substrate on which the embossing mass to be embossed is located.

A major problem in the prior art is the structural design of the heating systems. Most heating systems are large, chunky, cumbersome, expensive, and do not produce the heat near the hardened embossing mass or the embossing mass to be embossed. The generated heat must be transported over the entire stamp and / or through the sample holder and the substrate for embossing. In particular, one is more efficient

Thermal contact between the heating system and the support on which the

Soft punch is lost when the carrier and the soft punch are bent and the heating is done from the punch side. The heat flow from the heating system in the direction of the embossing mass to be cured must then, if the heating system itself was not designed to be bendable, bridge the thermal resistance between the back of the support and its heating surface.

It is therefore the object of the present invention to eliminate the disadvantages of the prior art.

This object is achieved with the subject matter of the independent claims. Advantageous developments of the invention are in the

Subclaims specified. All combinations of at least two features specified in the description, the claims and / or the figures fall within the scope of the invention. Insofar as value ranges are specified, any intermediate values shall also be regarded as limit values with disclosed.

Provided according to the invention is a stamp, comprising a

A soft stamp and a carrier fixed to the soft stamp, wherein the carrier has at least one heating element.

Preferably, the carrier and the dies are exclusively over

Adhesive forces fixed together, in particular by the soft stamp is impressed on the carrier. It is conceivable, although it is also possible, that a soft stamp is formed and fixed to the carrier via fixing elements which are located on the carrier. Also provided according to the invention is a device comprising a stamp according to the invention and a control unit,

in particular a current and / or voltage source, for controlling the at least one heating element.

The invention further provides for a use of a

punch according to the invention for embossing an embossing mass.

Also provided according to the invention is a method for embossing an embossing composition with a stamp according to the invention with the following

Steps, especially the following procedure:

Coating a substrate with the embossing mass,

Aligning the punch relative to the substrate,

Embossing of the embossing mass by the stamp,

Heating the embossing compound by the at least one heating element of the carrier,

Removal of the stamp from the embossing mass.

The invention is based in particular on the idea, the stamp for the hot stamping of two B auteilen with technically very different

To construct properties. The stamp consists of a support that is directly heatable, and a structural part (the soft stamp), which consists of a soft, deformable material. The support is designed to be directly heatable, i. the heating elements are constructed directly in the solid state structure of the carrier. The carrier is thus not only used as a mechanical construction element, but also as a heater, in particular as a thin film heater.

The distinguishing feature between the

Stamp according to the invention and B parts of the prior art, with which a corresponding soft stamp could also contact, is that the stamp according to the invention and thus also the carrier are deformable and have a correspondingly low bending resistance. Furthermore, in addition to its low bending resistance, the carrier has the at least one heating element.

The essence of the invention is in particular a stamp

to provide, in which the heating is generated by solid-physical processes, in particular via the generation Joulescher heat directly in the carrier of the stamp. In particular, this is a

Thin film heater. In particular, the heater is designed to fit in a carrier a few millimeters thick.

The necessary heat to cure the embossing mass is advantageously generated as close as possible to the embossing mass. This eliminates heat transfer over a longer distance or heat losses are minimized as far as possible. The entire stamp is a lot more compact and

cost-effective.

The stamp according to the invention has a soft stamp and a carrier fixed to the soft stamp, wherein the carrier at least one

Has heating element.

A support, in particular a backplate, is understood to mean a stabilizing element, in particular a

Construction element, for the soft stamp. The support may in particular be a plate or a foil. The carrier has at least one, active and / or passive, heater. A soft stamp is understood to mean the embossing element which has the structures with which the embossing mass is embossed. The soft stamp is, in particular reversible, so releasably fixed to the carrier.

Soft stamping materials for the production of the soft stamp may in particular be UV-curable materials or thermally curable materials. More generally, curing may be accomplished by electromagnetic radiation, heat, electricity, magnetic fields, and / or other methods. Soft stamps are for example molded as a negative of a master stamp.

The modulus of elasticity of the soft stamp material is less than 1000 GPa, preferably less than 500 GPa, more preferably less than 200 GPa, most preferably less than 100 GPa, most preferably less than 20 GPa.

A stamp is understood as the combination of a carrier and a soft stamp.

In particular, the soft structures of the soft stamp together with the flexibility of the carrier with its low bending resistance and the at least one heating element enable a more reliable demolding in comparison with the prior art.

Under the embossing composition (hereinafter also referred to embossing material) is meant a polymer which by the stamp, in particular the

Soft stamp, embossed and thus structured.

The embossing material may in particular be thermosetting material, thermoformable material, in particular thermoplastic material and / or a hybrid material, which is produced by a combination of thermal processes sen and irradiation with electromagnetic radiation is malleable.

A preferred embodiment of such a hybrid material is a material which is thermoplastic prior to exposure to UV light

Has properties, and then cured by irradiation with UV light. With preference, the curing process can be accelerated by simultaneous heating.

A substrate is understood to mean an object on which an embossing mass is deposited, which is to be embossed by the stamp according to the invention.

Other preferred embodiments:

It is preferably provided that

- The carrier is releasably fixed to the soft punch, and / or

- The stamp has a temperature-controlled carrier holder, and / or

- The at least one heating element as, in particular meandering, conductor track is formed, in particular as a metallic and / or n-doped region, and / or

- The at least one heating element as a coil, in particular flat coil, is formed, and / or

- The soft stamp has conductive nanoparticles, and / or

- The at least one heating element is formed as a conductive layer in and / or on the carrier, preferably the carrier consists at least partially, preferably completely, of a conductive material, in particular metal, and / or

a current density between 0.01 A / m ² and 1 MA / m ^{2 can be} produced in the support, preferably between 0. 1 A / m ² and 1 MA / m ² , more preferably between 1 A / m ² and 1 MA / m ² , more preferably between 10 amperes / m2 and 1 MA / m2, at most preferably between 100 A / m2 and 1 MA / m2, most preferably between 1000 A / m2 and 1 MA / m2, and / or

- The support is formed as a plate, wherein the thickness of the plate between 0.01 mm and 20 mm, preferably between 0.05 mm and 15 mm, more preferably between 0. 1 mm and 10 mm, more preferably between 0.5 mm and 5 mm, most preferably between 0.75mm and 2.5mm, on

most preferably between 1 mm and 2 mm, and / or

- The support is formed as a film, in particular as a film consisting of an organic semiconductor, wherein the thickness of the film between 0.01 mm and 5 mm, preferably between 0.05 mm and 2.5 mm, more preferably between 0. 1 mm and 2 mm, more preferably between 0.5 mm and 1 .5 mm, most preferably between 0.7 5 mm and 1.25 mm, most preferably between 1 mm and 1.25 mm.

The stamp according to the invention has at least one carrier and a soft stamp.

Preferably, the device also has a substrate holder, which fixes the substrate on which the embossing mass is deposited.

Preferably, the device also has a carrier holder, the tempered, in particular cooled, can be. The carrier holder is an important part of the device, whose task is in particular to keep the fiction, contemporary stamp and / or deform and / or after the heating process by the at least one heating element of the carrier also quickly and efficiently to cool again. The carrier holder is in particular designed so that the thermal conductivity maximum, or. the thermal resistance becomes minimal. In the further course of the disclosure, design-technical features are specified with the help of which the efficient temperature control, in particular cooling, of the stamp can be accomplished via the carrier holder. Advantageously, the stamp according to the invention, in particular in combination with the carrier holder due to the compact design and the associated reduced thermal mass and the shorter path for the heat conduction, allows much faster heating and cooling ramps than solutions from the prior art. Thus, a much higher throughput and thereby a substantial reduction in production costs are achieved.

With preference, the possible heating rate is> 40 ° C / min, more preferably> 100 ° C / min, more preferably> 20 ° C / s, even more preferably> 50 ° C / s, on

most preferably> 100 ° C / s.

The cooling rate reaches in particular> 20 ° C / min, preferably> 40 ° C / min, more preferably> 100 ° C / min, even more preferably> 40 ° C / s.

All embodiments of the invention, which can be installed in the carrier, can also in the substrate holder and / or in the

Carrier holder to be installed. This is of particular interest and advantage when symmetrical heating of the embossing mass, i. should be done from the top and bottom. In the further course, for the sake of clarity, all embodiments of the heater will be described only in connection with the carrier. All features also apply to the heater in connection with the substrate holder and / or the carrier holder.

The carrier may in particular consist of at least one of the following

Materials are made.

Metal, in particular Cu, Ag, Au, Al, Fe, Ni, Co, Pt, W, Cr, Pb, Ti, Ta, Zn, Sn

Semiconductors, especially O Ge, Si, Alpha-Sn, Fullerenes, B, Se, Te Compound semiconductors, especially GaAs, GaN, InP, InxGaI-xN, InSb, InAs, GaSb, AlN, InN, GaP, BeTe, ZnO, CuInGaSe2, ZnS, ZnSe, ZnTe, CdS, CdSe, CdTe, Hg (l -x) Cd (x) Te, BeSe, HgS, AlxGal -xAs, GaS, GaSe, GaTe,

InS, InSe, InTe, CuInSe2, CuInS2, CuInGaS2, SiC, SiGe

Polymer, in particular o acrylic ester-styrene-acrylonitrile, acrylonitrile / methyl methacrylate,

Acrylonitrile / butadiene / acrylate, acrylonitrile / chlorinated

Polyethylene / styrene, acrylonitrile-butadiene-styrene, acrylic polymers, alkyd resins, butadiene rubber, butyl rubber, casein plastics, artificial horn, cellulose acetate, cellulose ethers and derivatives, cellulose hydrate, cellulose nitrate, chitin, chitosan, chloroprene rubber, cyclo-olefin copolymers, Unitary polyvinyl chloride, epoxy resin, ethylene-ethyl acrylate copolymer, ethylene-polyvinyl acetate, ethylene-propylene copolymer, ethylene-propylene-diene rubber, ethylene-vinyl acetate, expandable polystyrene, fluororubber, urea-formaldehyde resin, urea resins, isoprene rubber, lignin, melamine-formaldehyde resin, melamine resins, Methyl acrylate / butadiene /

Styrene, natural rubber, perfluoroalkoxylalkane, phenol-formaldehyde resin, polyacetals, polyacrylonitrile, polyamide, polybutylene succinate, polybutylene terephthalate, polycaprolactone, polycarbonate, polycarbonates, polychlorotrifluoroethylene, polyesters, polyesteramide, polyether alcohols, polyether-blocking amide, polyetherimide, polyetherketones, polyethersulfone, polyethylene, polyethylene terephthalate , Polyhydroxyalkanoates,

Polyhydroxybutyrate, polyimide, polyisobutylene, polylactide (polylactic acid), polymethacrylmethylimide,

Polymethyl methacrylate, polymethylpentene, polyoxymethylene or polyacetal, polyphenylene ether, polyphenylene sulfide, Polyphthalamide, polypropylene, polypropylene copolymers, polypyrrole, polystyrene, polysulfone, polytetrafluoroethylene, polytrimethylene terephthalate, polyurethane, polyvinyl acetate, polyvinyl butyral, polyvinyl chloride (rigid PVC), polyvinyl chloride (plasticized PVC), polyvinylidene fluoride, polyvinylpyrrolidone, styrene-acrylonitrile copolymer, styrene-butadiene Rubber, styrene-butadiene-styrene, synthetic rubber, thermoplastic polyurethane, unsaturated polyester, vinyl acetate copolymers, vinyl chloride / ethylene / methacrylate, vinyl chloride / ethylene, vinyl chloride-vinyl acetate copolymers, plasticized polyvinyl chloride

• Metallic glasses

Non-metallic glasses, in particular o Organic non-metallic glasses o Inorganic non-metallic glasses, in particular non-oxidic glasses, in particular

• halide glasses

• chalcogenide glasses

* Oxidic glasses, in particular

• phosphatic glasses

S silicate glasses, in particular o aluminosilicate glasses o lead silicate glasses o alkali silicate glasses, in particular alkali alkaline earth silicate glasses o borosilicate glasses o Quartz glass

^■ Borat glasses, in particular o alkali borate glasses

• Materials that are referred to as glasses but are not o S aphir glass.

In a preferred embodiment of the invention, the carrier has a semiconductor and / or compound semiconductor material and preferably has at least one conductive region.

In particular, in the carrier in addition to the at least one

Heating element also other functional units, in particular

Sensors, preferably temperature sensors, memory and / or microchips are located. By using heating elements, sensors and / or microchips, in particular an entire control device for a control loop can be produced in the carrier.

In this preferred embodiment according to the invention, at least one conductive region, through which current can flow, can be generated directly in the carrier by means of a plurality of process steps. In a first

Process step brings this one, in particular photosensitive, paint on the support. In a second process step, the paint is structured, in particular by imprinting and / or photolithographic processes. In a third process step, the paint is developed. In a further process step, the lacquer thus produced serves as a doping mask during a doping process in which the semiconductor material is doped at the regions accessible for the doping elements. In a further process step, the paint is removed. This exemplary process can be a Semiconductor carriers are created with at least one conductive area.

In a special, preferred embodiment according to the invention, the carrier has a dielectric and has at least one conductive, in particular metallic, region.

In particular, the carrier consists of a dielectric in which at least one conductive, in particular metallic, region is introduced by a plurality of different processes. In a first process step, a, in particular photosensitive, paint is applied to the dielectric support. In a second process step, the paint is structured, in particular by imprinting and / or photolithographic processes. In a third process step, the paint is developed. In a further process step, the lacquer thus produced serves as an etching mask during an etching process in which the dielectric material is etched at the areas accessible to the etching substance. In a further process step, the paint is removed. In a further process step, an electrical material is applied to the carrier and in particular fills the etched areas. In a further process step, the coating side of the carrier is thinned until all the metal has been removed from the top and only fills the etched areas in the dielectric carrier. Through this exemplary process, a dielectric carrier may be provided with conductive

Areas are created.

In particular, the at least one conductive region is used to create structures that generate heat. In particular, Joule heat is generated, i. Power dissipation of heat.

In another preferred embodiment, the carrier has at least one coil, in particular a flat coil. This can be flat coils in Carriers are generated. The flat coils can, if they are traversed by a high-frequency alternating current, generate heat in adjacent, conductive regions, in particular by induction.

In another preferred embodiment, the soft stamp has conductive nanoparticles. In particular, there are conductive

Nanoparticles in the soft stamp, so that a high - frequency alternating magnetic field, which is generated in the carrier, the nanoparticles in the

Warm stamp heated.

Preferably, the carrier consists of conductive areas, which are designed as coils, in particular flat coils. The coils will be

preferably traversed by an alternating current and thus generate a time-varying magnetic field. The coils are preferably connected directly to each other and preferably distributed uniformly over the carrier, so that the highest possible number of magnetic field sources is present. Advantageously, as homogeneous a magnetic field as possible should be generated by a large number of coils.

In another preferred embodiment, the support consists at least partially, preferably entirely of a conductive material,

especially metal. The heating is generated by a high current density, which is generated in the metallic carrier. The current density is greater, the smaller the cross-sectional area of the carrier is. The length and width of the carrier are determined and predetermined by the size of the soft punch. The thickness of the carrier can usually be chosen freely, as long as the necessary mechanical stability of the carrier is maintained. The thickness of the carrier is therefore preferably minimal.

The current density is, in particular for a three-level confidence level of 98%, between 0.01 A / m2 and 1 MA / m2, preferably between 0. 1 A / m2 and 1 MA / m2, more preferably between 1 A / m2 and 1 MA / m2, even more preferably between 10 A / m2 and 1 MA / m2, most preferably between 100 A / m2 and 1 MA / m2, most preferably between 1000 A / m2 and 1 MA / m2.

In another preferred embodiment, the

Carrier around a plate.

The thickness of the plate is, especially for a three-Sigma

Confidence level of 98%, between 0.01 mm and 20 mm, preferably between 0.05 mm and 15 mm, more preferably between 0. 1 mm and 10 mm, even more preferably between 0.5 mm and 5 mm, most preferably between 0.5 mm and 2.5 mm, most preferably between 0.5 mm and 2 mm.

In another preferred embodiment, the

Support for a film, in particular a film consisting of an organic semiconductor.

The thickness of the film is, especially for a three-Sigma

Confidence level of 98%, between 0.01 mm and 5 mm, preferably between 0.05 mm and 2.5 mm, more preferably between 0. 1 mm and 2 mm, even more preferably between 0.5 mm and 1 .5 mm, most preferably between 0.5 mm and 1 .25 mm, most preferably between 0.5 mm and 1 .25 mm.

In another preferred embodiment, the stamp is part of a device that is designed so that the direction of the heat flow generated by the carrier can be controlled in a targeted manner. During the curing of the embossing mass, the device preferably conducts the heat of the carrier exclusively in the direction of the embossing mass to be cured. After curing of the embossing se se, the cooling of the stamp, in particular of the carrier, and / or the embossing compound by a diversion of Heat flow in the Prägemasse opposite side supported. This diversion is accomplished by a change in the thermal resistance R. The thermal resistance R is the quotient of the temperature difference DT (delta T) and the heat flow dQ / dt, ie

The thermal resistance R is therefore not a pure material parameter but depends on environmental parameters, in particular the external temperature T _A. By a corresponding cooling system, the thermal resistance R can therefore be influenced very easily.

The thermal resistance can also be due to pure material and

Geometry parameters are defined.

In this case, 1 and A are the thickness or the cross section of the heat-traversed (homogeneous) body, in particular carrier holder, and l is its thermal conductivity. By a relatively small thickness of the support holder so the thermal resistance can be reduced very easily in terms of design.

The device has in particular at the back of the stamp

Devices for tempering, in particular cooling, of the stamp. In a particular preferred embodiment, the carrier contacts a coolable carrier holder. The carrier holder has in particular over

Cooling elements, in particular cooling fins. Also conceivable would be Peltier elements or depressions, in particular hoses or pipes, through which a cooling fluid is pumped. What is important is that a quantity of heat from the

Carrier holder is added, by constructional measures as efficiently as possible, is dissipated. Preferably, the removal takes place with cooling fluids.

In the device, punches, in particular soft punches and carriers, and / or the substrate holder and / or the substrate may also be transparent to electromagnetic radiation, to combine the use of thermal curing and electromagnetic curing.

The electromagnetic radiation then preferably has a

Wavelength in the range between 1m and 2,000nm, preferably between 50nm and 1 500nm, more preferably between 10nm and 1 000nm, most preferably between 1 50nm and 500nm, most preferably between 200nm and 370nm.

Another aspect of the invention which is preferred according to the invention is that the soft stamp can be removed from the carrier to provide the carrier with a new, fresh, less used and less defective, new soft stamp. The soft stamp can be so worn after several embossing processes that s an exchange is mandatory. In particular, the carrier is cleaned with a soft stamp before the new installation. This makes it possible to use the relatively expensive to be produced carrier several times.

The removal of the soft stamp may be effected, for example, by one of the following methods and / or by a combination of such methods: thermally e.g. by increasing the temperature above the

Glass transition temperature, mechanically, physically and / or chemically physically eg. by ashing with plasma, in particular with 0 ₂ plasma, chemically eg. by chemical cleaning with solvents such as piranha or solvent mixtures. The complete replacement can in particular by the combination of chemical dissolution or thermal treatment and mechanical action.

In another preferred embodiment, all possible and imaginable semiconductor components can be manufactured directly in the carrier. It is conceivable, for example, that in addition to the heating elements according to the invention, microchips for the measurement, temperature sensors, bending sensors etc. are directly incorporated in the carrier in order to provide the carrier with a plurality of different active and passive components. The carrier is characterized by the pure construction element to the functional element.

method

The invention further relates to a method for embossing a embossing composition with the stamp according to the invention and the use of the

punch according to the invention for embossing an embossing mass.

In a first step of the invention it is preferred to process a substrate with an embossing composition. The substrate is located on a substrate holder and is preferably fixed by the substrate holder, so that a displacement of the substrate is no longer possible.

In a second step of the invention, the stamp is aligned relative to the substrate, in particular with optical aids. The alignment preferably takes place with the aid of alignment marks which are located on the one hand on the carrier, more preferably on the soft stamp, on the other hand on the substrate. This allows a very accurate positioning of the soft punch. S ind carrier and soft stamp and / or substrate and substrate holder in particular transparent to the electromagnetic radiation used for alignment, the alignment of the two objects is preferably effected by a so-called face-to-face alignment. In a third method step according to the invention, the embossing material is embossed by the stamp, in particular by the soft stamp.

In this case, the embossing can either take place in such a way that the soft stamp makes contact with the embossing mass by means of a relative approximation of substrate and carrier to one another and stamps it as uniformly as possible. It is also conceivable that a deformation element is used to bend the punch, in particular centric, convex and thereby press with its central part first in the embossing mass.

The carrier may during deformation with the carrier holder,

especially peripherally, remain connected or completely detached from the carrier holder. In particular, reference is made here to the publication WO2015161868. It is also conceivable that stamp and embossing mass are approximated relative to each other without the stamp is deformed.

In a fourth method according to the Invention step is a

Heating the embossing compound by the fiction, contemporary embodiment. According to the invention, the heat in the heating elements of the carrier, i. produced as close to the embossing mass.

In a fifth method according to the invention, a process step is carried out

Removal of the punch, in particular the soft punch, from the

Stamping ground.

Further advantages, features and details of the invention will become apparent from the following B description of preferred embodiments and from the drawings. The show in:

1a shows a first embodiment according to the invention in side view, Figure lb is the first embodiment of the invention in plan view, Figure 2a is a second embodiment of the invention in side view, Figure 2b shows the second embodiment according to fiction, in plan view, Figure 3a is a third embodiment according to the Invention in side view, Figure 3b the third embodiment according to the Invention, in plan view, FIG 4 a fiction, contemporary device.

In the figures, the same parts or parts with the same function are marked with the same reference numerals.

FIG. 1 a shows a top view of a first fiction, contemporary

Embodiment of a stamp 3, consisting of a carrier 1 and a soft stamp 2 (not visible in the top view). According to the invention, the carrier 1 has heating elements 4. The heating elements 4 are shown in FIG. 1a as simple meander-shaped conductor tracks. The

Conductors are traversed by a stream. The high current density generates enough Joule heat to eat the invention fiction

Perform heating process. Is the carrier 1 a

Dielectric, the heating elements 4 are preferably made of a metal. If the carrier 1 is a semiconductor material, the heating elements 4 can be, for example, doped, in particular n-doped, regions.

FIG. 1b shows a side view of the first invention

Embodiment of a stamp 3, consisting of a carrier 1 and a soft stamp 2. The parts of the stamp 3 are not to scale shown in order to improve the presentation. In particular, the

Soft stamp structures 2s smaller by a multiple in relation to the total size of the soft stamp 2.

FIG. 2a shows a top view of a second invention

Embodiment of a stamp 3, consisting of a carrier 1 and a soft stamp 2. The carrier 1 according to the invention has heating elements 4 'in coil form. The tracks are traversed by a current. The high current density generates enough Joule heat to do so

perform heating process according to the invention. According to the invention, however, is preferred that the coil-shaped heating elements 4 'of a

High-frequency alternating current are flowed through to generate a strong temporal change of the magnetic flux.

FIG. 2b shows a side view of the second invention

Embodiment of a stamp 3, consisting of a carrier 1 and a soft stamp 2. The magnetic field lines 5 are exemplified for one of the coil-shaped heating elements 4 '. On the representation of the magnetic field lines 5 for the other two heating elements 4 'is omitted for clarity.

A time-varying magnetic field induces a voltage in an electrical device through which the magnetic field lines 5 flow and thus generates a current in the electrical system. This current in turn generates Joule's heat. In particular, it is ensured by the so-called skin effect that the currents thus induced are located only on the surface of the electrical system and heat up the electrical system accordingly.

Conceivable is the heating of, in particular, metallic, particles 6, which are located in the die 2. The heating is thus advantageously even closer to the soft stamp 2, and thus to the embossing compound brought. The heating elements 4 'are installed directly in the carrier 1 and deform with the carrier and adapt to.

FIG. 3 a shows a top view of a third invention

Embodiment of a stamp 3, consisting of a carrier 1 and a soft stamp 2. In this particular embodiment, the entire carrier 1 is conductive and is flowed through the entire surface of a stream. The (especially single) heating element 4 "may in turn be a metal or a doped semiconductor.

FIG. 3b shows a side view of the third fiction, contemporary

Embodiment of a stamp 3, consisting of a carrier 1 and a soft stamp 2. The heating element 4 "extends over only one,

in particular small, thickness t. The small thickness t ensures that the current density and thus the Joule heat are as high as possible.

4 shows a side view of a device, comprising the punch 3, with carrier 1 and soft stamp 2, a carrier holder 10, with fixings 1 1, which fix the carrier 1 on the carrier holder 10, a deformation element 13 for the deformation of the punch 3, cooling elements 12th for cooling the carrier holder 10 and thus also of the stamp 3, as well as a substrate holder 9, which supports the substrate 7, on which the embossing mass 8

is deposited. The current source 15 may be either a DC or an AC source, depending on the embodiment used according to the invention. About the circuit 14, the heating elements 4 are supplied in the carrier 1 with power.

The inventive concept of installing heating elements 4 in the carrier 1 is extended by the optional possibility of active and / or passive cooling of the punch 3 by the carrier holder 10. In particular, by the use of active cooling by means of cooling elements 12, preferably cooling fins, which are flowed around by a fluid, the carrier 1 can be cooled again very quickly.

S e c tio n s ia s

carrier

soft temple

s soft stamp structures

stamp

, 4 ', 4' heating elements

Magnetic field lines

Particles, in particular nanoparticles

substratum

stamping ground

substrate holder

0 carrier holder

1 fixation

2 cooling element

3 curvature element

4 circuit

5 power source

Thickness of the heating elements

Claims

P at ent sp r e ch e

1st stamp (3), comprising a soft stamp (2) and an am

Soft stamp (2) fixed carrier (1), characterized in that the carrier (1) has at least one heating element (4, 4 ', 4 ").

2. punch (3) according to claim 1, wherein the carrier (1) is releasably fixed to the soft punch (2).

3. punch (3) according to any one of the preceding claims, wherein the punch (3) has a temperature-controlled carrier holder (10).

4. stamp (3) according to one of the preceding claims, wherein the at least one heating element (4) than, in particular

Meander-shaped, conductor track is formed, in particular as

metallic and / or n-doped region.

5. punch (3) according to one of the preceding claims, wherein the at least one heating element (4 ') as a coil, in particular

Flat coil, is formed.

6. stamp (3) according to one of the preceding claims, wherein the soft stamp (2) conductive nanoparticles (6).

7. StempeT (3) according to one of the preceding claims, wherein the at least one heating element (4 ") as a conductive layer in and / or on the carrier (1) is formed, preferably the carrier (1) at least partially, preferably completely , of a conductive material, in particular metal.

8. stamp (3) according to one of the preceding claims, wherein in the carrier (1) a current density between 0.01 A / m ² and 1 MA / m ^{2 can be} generated, preferably between 0.1 A / m and 1 MA / m, more preferably between 1 A / m ² and 1 MA / m ² , more preferably between 10 A / m ² and 1 MA / m ² , most preferably between 100 A / m ² and 1 MA / m, most preferably between 1000 A / m and 1 MA / m.

9. punch (3) according to one of the preceding claims, wherein the carrier (1) is formed as a plate, wherein the thickness of the plate between 0.01 mm and 20 mm, preferably between 0.05 mm and 15 mm, more preferably between 0. 1 mm and 10 mm, still

more preferably between 0.5 mm and 5 mm, most preferably between 0.75 mm and 2.5 mm, most preferably between 1 mm and 2 mm.

10. punch (3) according to one of the preceding claims, wherein the carrier (1) is formed as a film, in particular as a film consisting of an organic semiconductor, wherein the thickness of the film is between 0.01 mm and 5 mm, preferably between 0.05 mm and 2.5 mm, more preferably between 0. 1 mm and 2 mm, still

more preferably between 0.5 mm and 1 .5 mm, most preferably between 0.7 5 mm and 1.25 mm, most preferably between 1 mm and 1 .25 mm.

1 1. A device comprising a punch (3) according to one of

preceding claims, and a control unit (15), in particular a current and / or voltage source, for controlling the at least one heating element (4,4 ', 4 ").

12. Use of a stamp (3) according to one of the preceding

Claims for embossing a Prägemasse.

13. A method for embossing an embossing compound (8) with a stamp (3) according to one of the preceding claims, with the following steps, in particular the following sequence:

Coating a substrate (7) with the embossing mass (8), aligning the stamp (3) relative to the substrate (7),

Embossing of the embossing mass (8) by the punch (3),

Heating the embossing compound (8) by the at least one heating element (4, 4 ', 4 ") of the carrier (1),

Removal of the punch (3) from the embossing mass (8).